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GM gives you their approved tune right from the factory.
A tune is simply an aftermarket reprogramming of the computer.
You can buy a Diablo or HP tuner program, and adjust each parameter yourself.
GM has the computer flash programmed exactly how they want it.
If they find a better way, (as far as they are concerned) they will issue new programming. (reflash)
It is designed for many purposes: Performance, emissions, driveline durability, etc.
When a car is tuned, or reprogrammed, it is violating GM's design, and therefore voids the warranty, if they want to.
There will never be a GMPP tune. It would be like the police selling burglar tools.
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Go from the presence of a foolish man, when thou perceivest not in him the lips of knowledge
General Motors ASEP, A.S. Automotive Technology, Telecommunications Specialist, CISCO Network Engineer
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